Method for preparing solution by digesting low-carbon steel powder sample

Abstract

The invention relates to a method for preparing a solution by digesting a low-carbon steel powder sample and belongs to the field of solution preparation. The method comprises the following steps: drilling low-carbon steel powder; putting the low-carbon steel powder into a tapered bottle and adding hydrochloric acid with the mass percent concentration of 36wt%-38wt% into the tapered bottle; adding the hydrochloric acid and shaking to sufficiently contact the low-carbon steel powder with the hydrochloric acid; putting the tapered bottle into a water bath pot to be heated in a water bath of 80-85 DEG C; after heating in the water bath, putting the tapered bottle into a drying box to be dried to obtain completely-digested metal salt; and finally, repeatedly enabling the volume to be constant by using de-ionized water to obtain a corresponding solution. According to the method, the hydrochloric acid with the mass percent of 36wt%-38wt% is adopted to digest the low-carbon steel powder sample; the method is safer than previous digestion under a high temperature and a high pressure by using concentrated nitric acid and perchloric acid; a microwave digestion instrument is used for digesting a test sample and is cheap; and the digestion is also complete and effective and a solution needed by follow-up component analysis is provided.

Description

technical field [0001] The invention relates to a method for preparing a solution by digesting a low-carbon steel powder sample, and belongs to the field of solution preparation. Background technique [0002] The preparation of sample solution is a common method for physical and chemical testing of samples such as component analysis. Qualitative and quantitative analysis is particularly important. Therefore, how to prepare sample solution safely, quickly and effectively is very important, and the key problem to be solved when preparing sample solution is the digestion of steel powder sample. [0003] Traditionally, concentrated nitric acid and perchloric acid are used for digestion at high temperature and high pressure. Although the digestion is complete, the reaction is violent. If the measurement and operation are not properly controlled, an explosion will occur, and both nitric acid and perchloric acid are particularly corrosive. Personnel and experimental equipment are...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, concentrated nitric acid and perchloric acid are used for digestion at high temperature and high pressure. Although the digestion is complete, the reaction is violent. If the measurement and operation are not properly controlled, an explosion will occur, and both nitric acid and perchloric acid are particularly corrosive. Greater damage to personnel and experimental equipment

With the improvement of technology and automation, microwave digestion instruments are also used to digest samples. Although the digestion process is highly automated and the digestion is thorough, a microwave digestion instrument is expensive.